68181849 has 12 divisors (see below), whose sum is σ = 104278356. Its totient is φ = 42780672.

The previous prime is 68181833. The next prime is 68181857. The reversal of 68181849 is 94818186.

It can be written as a sum of positive squares in 2 ways, for example, as 48441600 + 19740249 = 6960^2 + 4443^2 .

It is not a de Polignac number, because 68181849 - 2⁴ = 68181833 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68181809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222664 + ... + 222969.

It is an arithmetic number, because the mean of its divisors is an integer number (8689863).

Almost surely, 2^68181849 is an apocalyptic number.

It is an amenable number.

68181849 is a deficient number, since it is larger than the sum of its proper divisors (36096507).

68181849 is a wasteful number, since it uses less digits than its factorization.

68181849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445656 (or 445653 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 68181849 is about 8257.2301045811. The cubic root of 68181849 is about 408.5290318733.

The spelling of 68181849 in words is "sixty-eight million, one hundred eighty-one thousand, eight hundred forty-nine".